钉扎磁化率：研究玻璃形成液中非晶有序生长的新方法
Pinning Susceptibility : A Novel Method to Study Growth of Amorphous Order in Glass-forming Liquids
摘要：
在接近玻璃化转变的过冷液体中，非晶有序的存在和生长是一个研究热点。即使经过几十年的工作，仍然没有明确的共识的分子机制，导致液体动力学接近这一假定的转变迅速放缓。与无定形顺序相关的相关长度的存在最近被假定，并且也被估计使用多点关联函数，这在实验中不能容易地计算。因此，对无定形有序生长的研究仍然主要限于胶体玻璃和模型玻璃形成液体的模拟等系统。在这封信中，我们提出了一个实验上可实现的但简单的关联函数来研究非晶有序的生长。然后，我们证明了这种方法的有效性为几个研究模型过冷液体，并获得与其他传统方法相一致的结果。
英文摘要：
Existence and growth of amorphous order in supercooled liquids approaching glass transition is a subject of intense research. Even after decades of work, there is still no clear consensus on the molecular mechanisms that lead to a rapid slowing down of liquid dynamics approaching this putative transition. The existence of a correlation length associated with amorphous order has recently been postulated and also been estimated using multi-point correlation functions which cannot be calculated easily in experiments. Thus the study of growing amorphous order remains mostly restricted to systems like colloidal glasses and simulations of model glass-forming liquids. In this Letter, we propose an experimentally realizable yet simple correlation function to study the growth of amorphous order. We then demonstrate the validity of this approach for a few well-studied model supercooled liquids and obtain results which are consistent with other conventional methods.
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